Infinity loop

Hello, on of my user repport me an infinity loop, can you look:
#0 0x773cfc42 in ntdll!isdigit () from C:\Windows\System32\ntdll.dll
No symbol table info available.
#1 0x773cfc42 in ntdll!isdigit () from C:\Windows\System32\ntdll.dll
No symbol table info available.
#2 0x773ebeec in ntdll!RtlLookupAtomInAtomTable ()
from C:\Windows\System32\ntdll.dll
No symbol table info available.
warning: (Internal error: pc 0x383 in read in psymtab, but not in symtab.)

warning: (Internal error: pc 0x383 in read in psymtab, but not in symtab.)

#3 0x00000384 in ?? ()
warning: (Internal error: pc 0x383 in read in psymtab, but not in symtab.)

No symbol table info available.
warning: (Internal error: pc 0x383 in read in psymtab, but not in symtab.)

#4 0xffffffff in ?? ()
No symbol table info available.
#5 0x0028c874 in ?? ()
No symbol table info available.
#6 0x773ec578 in ntdll!RtlGetUnloadEventTrace ()
from C:\Windows\System32\ntdll.dll
No symbol table info available.
warning: (Internal error: pc 0x383 in read in psymtab, but not in symtab.)

warning: (Internal error: pc 0x383 in read in psymtab, but not in symtab.)

warning: (Internal error: pc 0x383 in read in psymtab, but not in symtab.)

#7 0x00000384 in ?? ()
warning: (Internal error: pc 0x383 in read in psymtab, but not in symtab.)

No symbol table info available.
warning: (Internal error: pc 0x383 in read in psymtab, but not in symtab.)

#8 0x00000000 in ?? ()
No symbol table info available.

Cheer,